Event Loop Race

event_loop_race.ts

race()

function race() {
    let count = 1
    function finish(message) {
        console.log(`${count++}. ${message}`)
    }

    setTimeout(() => finish('timeout'), 0)

    if (typeof postMessage !== 'undefined') {
        addEventListener(
            'message',
            ({ data }) => data === 'race' && finish('onmessage'),
            { once: true }
        )
        postMessage('race')
    }

    if (typeof setImmediate !== 'undefined')
        setImmediate(() => finish('immediate'))

    if (typeof requestAnimationFrame !== 'undefined')
        requestAnimationFrame(() => finish('raf'))

    if (typeof process !== 'undefined')
        process.nextTick(() => finish('nextTick'))

    console.log('race has started')
}